Malicious PDF — malware analysis report

Static analysis result for SHA-256 60251fe93bd31888…

MALICIOUS

PDF

57.1 KB Created: 2020-08-09 12:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffc1de24158f5a2581b9b24dd78e50ea SHA-1: 94048b4e751ef14d8b9955e2303d92583e566d2b SHA-256: 60251fe93bd31888c976c4fda28310fc10e0f80e2cd7c97db1c32f6dc7bd5602
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service identified as malicious. The document body itself is heavily obfuscated but contains references to the malicious URL and benign-looking PDF links, likely intended to lure users into clicking through to the malicious site. The ML classifier strongly indicated maliciousness, supporting the conclusion that this document is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=project+on+working+capital+management+in+banks+pdf
    • http://nofowadir.authoroliviahowe.com/uploads/1/3/1/6/131606349/4020790.pdf
    • http://terop.fundamentaladvantages.net/uploads/1/3/1/0/131070161/duzoge-nadegobowiz-wozusuj.pdf
    • http://files.pinkturtledesigns.co.uk/uploads/1/3/1/1/131164425/mekazodokotiw_dovasamu_lefulitogav_nekekelikikir.pdf
    • http://gepede.teaneckgirlssoccer.com/uploads/1/3/1/6/131636725/fubojalisoweg.pdf
    • http://files.denisemorillalyons.com/uploads/1/3/1/0/131070895/1584d92fec46b9f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48675385277.pdf
    • https://cdn.shopify.com/s/files/1/0430/3237/9545/files/zikanutejolinopog.pdf
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/67762340320.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/ab_initio_training_material.pdf
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/78689131639.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/agricultural_bank_of_china_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/antonyms_worksheets_for_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0437/5845/2897/files/lyman_reloading_manual_50th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6733015585.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009395.bin
1267b1b59222d22394afa15ce10852203664df79770adcde94a02175fc8e0872		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9395 5636 bytes
font_01_sfnt_off0000a6b6.bin
82586825193df7a624d11e7efd84ee186e91a80abb044d85faf5d400e00dd35e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6B6 9980 bytes
font_02_sfnt_off0000c8e0.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E0 4324 bytes

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